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<td>Result </thead> <tr> <td>\${param["foo"]} <td>${fn:escapeXml(param["foo"])}  </tr> <tr> <td>\${my:reverse(param["foo"])} <td>${my:reverse(fn:escapeXml(param["foo"]))}  </tr> <tr> <td>\${my:reverse(my:reverse(param["foo"]))} <td>${my:reverse(my:reverse(fn:escapeXml(param["foo"])))}  </tr> <tr> <td>\${my:countVowels(param["foo"])} <td>${my:countVowels(fn:escapeXml(param["foo"]))}  </tr> </table> </code> </blockquote> </body> </html>

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Tomcat example source code file (functions.jsp)

This example Tomcat source code file (functions.jsp) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

apache, asf, asf, expression, expression, functions, functions, language, license, license, of, see, version, you

The Tomcat functions.jsp source code

 Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at


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  distributed under the License is distributed on an "AS IS" BASIS,
  See the License for the specific language governing permissions and
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<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<%@ taglib prefix="my" uri="http://jakarta.apache.org/tomcat/jsp2-example-taglib"%>

    <title>JSP 2.0 Expression Language - Functions
    <h1>JSP 2.0 Expression Language - Functions
    An upgrade from the JSTL expression language, the JSP 2.0 EL also
    allows for simple function invocation.  Functions are defined
    by tag libraries and are implemented by a Java programmer as 
    static methods.

      <u>Change Parameter
      <form action="functions.jsp" method="GET">
	  foo = <input type="text" name="foo" value="${fn:escapeXml(param["foo"])}">
          <input type="submit">
        <table border="1">
	    <td>EL Expression

my book on functional programming


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